Neither Protonmail nor NotbyEmail offers a free trial.
Protonmail is designed for Large Enterprises, Medium Business and Small Business.
NotbyEmail is designed for Large Enterprises, Medium Business and Small Business.
The starting price of NotbyEmail begins at $94/Year, while pricing details for Protonmail are unavailable.
Some top alternatives to Protonmail includes ProtonVPN, Tutanota, Mailfence, NeoCertified, DataMotion Secure Email, Telios, Qualified, Workvivo, Sealit, NotbyEmail and PoliteMail.
Some top alternatives to NotbyEmail includes SenditCertified, NeoCertified, Yournotify, Censornet Email, Qualified, Workvivo, Emaily, IFTTT, Online Check Writer and MimeCast Email Security.